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<li>Qt 5.5</li>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-types">Public Types</a></li>
<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#public-slots">Public Slots</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#static-public-members">Static Public Members</a></li>
<li class="level1"><a href="#protected-functions">Protected Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
<li class="level2"><a href="#rendering">Rendering</a></li>
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<h1 class="title">QQuickWindow Class</h1>
<!-- $$$QQuickWindow-brief -->
<p>The <a href="qquickwindow.html">QQuickWindow</a> class provides the window for displaying a graphical QML scene <a href="#details">More...</a></p>
<!-- @@@QQuickWindow -->
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QQuickWindow></span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += quick</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 5.0</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Instantiated By:</td><td class="memItemRight bottomAlign"> <a href="qml-qtquick-window-window.html">Window</a></td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> </td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherited By:</td><td class="memItemRight bottomAlign"> <p><a href="qquickview.html">QQuickView</a></p>
</td></tr></table></div><ul>
<li><a href="qquickwindow-members.html">List of all members, including inherited members</a></li>
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<a name="public-types"></a>
<h2 id="public-types">Public Types</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#CreateTextureOption-enum">CreateTextureOption</a></b> { TextureHasAlphaChannel, TextureHasMipmaps, TextureOwnsGLTexture, TextureCanUseAtlas }</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> flags </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#CreateTextureOption-enum">CreateTextureOptions</a></b></td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#RenderStage-enum">RenderStage</a></b> { BeforeSynchronizingStage, AfterSynchronizingStage, BeforeRenderingStage, AfterRenderingStage, AfterSwapStage }</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#SceneGraphError-enum">SceneGraphError</a></b> { ContextNotAvailable }</td></tr>
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<a name="properties"></a>
<h2 id="properties">Properties</h2>
<ul>
<li class="fn"><b><a href="qquickwindow.html#activeFocusItem-prop">activeFocusItem</a></b> : QQuickItem * const</li>
<li class="fn"><b><a href="qquickwindow.html#color-prop">color</a></b> : QColor</li>
<li class="fn"><b><a href="qquickwindow.html#contentItem-prop">contentItem</a></b> : QQuickItem * const</li>
</ul>
<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#QQuickWindow">QQuickWindow</a></b>(QWindow *<i> parent</i> = 0)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#dtor.QQuickWindow">~QQuickWindow</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QAccessibleInterface * </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#accessibleRoot">accessibleRoot</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QQuickItem * </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#activeFocusItem-prop">activeFocusItem</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#clearBeforeRendering">clearBeforeRendering</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QColor </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#color-prop">color</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QQuickItem * </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#contentItem-prop">contentItem</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QSGTexture * </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#createTextureFromId">createTextureFromId</a></b>(uint<i> id</i>, const QSize &<i> size</i>, CreateTextureOptions<i> options</i> = CreateTextureOption( 0 )) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QSGTexture * </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#createTextureFromImage">createTextureFromImage</a></b>(const QImage &<i> image</i>, CreateTextureOptions<i> options</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QSGTexture * </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#createTextureFromImage-2">createTextureFromImage</a></b>(const QImage &<i> image</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#effectiveDevicePixelRatio">effectiveDevicePixelRatio</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QImage </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#grabWindow">grabWindow</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QQmlIncubationController * </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#incubationController">incubationController</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#isPersistentOpenGLContext">isPersistentOpenGLContext</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#isPersistentSceneGraph">isPersistentSceneGraph</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#isSceneGraphInitialized">isSceneGraphInitialized</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QQuickItem * </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#mouseGrabberItem">mouseGrabberItem</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QOpenGLContext * </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#openglContext">openglContext</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QOpenGLFramebufferObject * </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#renderTarget">renderTarget</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> uint </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#renderTargetId">renderTargetId</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QSize </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#renderTargetSize">renderTargetSize</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#resetOpenGLState">resetOpenGLState</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#scheduleRenderJob">scheduleRenderJob</a></b>(QRunnable *<i> job</i>, RenderStage<i> stage</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#sendEvent">sendEvent</a></b>(QQuickItem *<i> item</i>, QEvent *<i> e</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#setClearBeforeRendering">setClearBeforeRendering</a></b>(bool<i> enabled</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#color-prop">setColor</a></b>(const QColor &<i> color</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#setPersistentOpenGLContext">setPersistentOpenGLContext</a></b>(bool<i> persistent</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#setPersistentSceneGraph">setPersistentSceneGraph</a></b>(bool<i> persistent</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#setRenderTarget">setRenderTarget</a></b>(QOpenGLFramebufferObject *<i> fbo</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#setRenderTarget-2">setRenderTarget</a></b>(uint<i> fboId</i>, const QSize &<i> size</i>)</td></tr>
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<a name="public-slots"></a>
<h2 id="public-slots">Public Slots</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#releaseResources">releaseResources</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#update">update</a></b>()</td></tr>
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<a name="signals"></a>
<h2 id="signals">Signals</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#activeFocusItem-prop">activeFocusItemChanged</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#afterAnimating">afterAnimating</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#afterRendering">afterRendering</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#afterSynchronizing">afterSynchronizing</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#beforeRendering">beforeRendering</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#beforeSynchronizing">beforeSynchronizing</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#closing">closing</a></b>(QQuickCloseEvent *<i> close</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#color-prop">colorChanged</a></b>(const QColor &)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#frameSwapped">frameSwapped</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#openglContextCreated">openglContextCreated</a></b>(QOpenGLContext *<i> context</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#sceneGraphAboutToStop">sceneGraphAboutToStop</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#sceneGraphError">sceneGraphError</a></b>(QQuickWindow::SceneGraphError<i> error</i>, const QString &<i> message</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#sceneGraphInitialized">sceneGraphInitialized</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#sceneGraphInvalidated">sceneGraphInvalidated</a></b>()</td></tr>
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<a name="static-public-members"></a>
<h2 id="static-public-members">Static Public Members</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#hasDefaultAlphaBuffer">hasDefaultAlphaBuffer</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#setDefaultAlphaBuffer">setDefaultAlphaBuffer</a></b>(bool<i> useAlpha</i>)</td></tr>
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<a name="protected-functions"></a>
<h2 id="protected-functions">Protected Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#event">event</a></b>(QEvent *<i> e</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#exposeEvent">exposeEvent</a></b>(QExposeEvent *)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#focusInEvent">focusInEvent</a></b>(QFocusEvent *<i> ev</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#focusOutEvent">focusOutEvent</a></b>(QFocusEvent *<i> ev</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#hideEvent">hideEvent</a></b>(QHideEvent *)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#keyPressEvent">keyPressEvent</a></b>(QKeyEvent *<i> e</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#keyReleaseEvent">keyReleaseEvent</a></b>(QKeyEvent *<i> e</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#mouseDoubleClickEvent">mouseDoubleClickEvent</a></b>(QMouseEvent *<i> event</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#mouseMoveEvent">mouseMoveEvent</a></b>(QMouseEvent *<i> event</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#mousePressEvent">mousePressEvent</a></b>(QMouseEvent *<i> event</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#mouseReleaseEvent">mouseReleaseEvent</a></b>(QMouseEvent *<i> event</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#resizeEvent">resizeEvent</a></b>(QResizeEvent *<i> ev</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#showEvent">showEvent</a></b>(QShowEvent *)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qquickwindow.html#wheelEvent">wheelEvent</a></b>(QWheelEvent *<i> event</i>)</td></tr>
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<a name="details"></a>
<!-- $$$QQuickWindow-description -->
<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qquickwindow.html">QQuickWindow</a> class provides the window for displaying a graphical QML scene</p>
<p><a href="qquickwindow.html">QQuickWindow</a> provides the graphical scene management needed to interact with and display a scene of QQuickItems.</p>
<p>A <a href="qquickwindow.html">QQuickWindow</a> always has a single invisible root item. To add items to this window, reparent the items to the root item or to an existing item in the scene.</p>
<p>For easily displaying a scene from a QML file, see <a href="qquickview.html">QQuickView</a>.</p>
<a name="rendering"></a>
<h3 >Rendering</h3>
<p><a href="qquickwindow.html">QQuickWindow</a> uses a scene graph on top of OpenGL to render. This scene graph is disconnected from the QML scene and potentially lives in another thread, depending on the platform implementation. Since the rendering scene graph lives independently from the QML scene, it can also be completely released without affecting the state of the QML scene.</p>
<p>The <a href="qquickwindow.html#sceneGraphInitialized">sceneGraphInitialized</a>() signal is emitted on the rendering thread before the QML scene is rendered to the screen for the first time. If the rendering scene graph has been released, the signal will be emitted again before the next frame is rendered.</p>
<a name="integration-with-opengl"></a>
<h4 >Integration with OpenGL</h4>
<p>It is possible to integrate OpenGL calls directly into the <a href="qquickwindow.html">QQuickWindow</a> using the same OpenGL context as the Qt Quick Scene Graph. This is done by connecting to the <a href="qquickwindow.html#beforeRendering">QQuickWindow::beforeRendering</a>() or <a href="qquickwindow.html#afterRendering">QQuickWindow::afterRendering</a>() signal.</p>
<p><b>Note: </b>When using <a href="qquickwindow.html#beforeRendering">QQuickWindow::beforeRendering</a>(), make sure to disable clearing before rendering with <a href="qquickwindow.html#setClearBeforeRendering">QQuickWindow::setClearBeforeRendering</a>().</p><a name="exposure-and-visibility"></a>
<h4 >Exposure and Visibility</h4>
<p>When a <a href="qquickwindow.html">QQuickWindow</a> instance is deliberately hidden with hide() or setVisible(false), it will stop rendering and its scene graph and OpenGL context might be released. The <a href="qquickwindow.html#sceneGraphInvalidated">sceneGraphInvalidated</a>() signal will be emitted when this happens.</p>
<p><b>Warning:</b> It is crucial that OpenGL operations and interaction with the scene graph happens exclusively on the rendering thread, primarily during the updatePaintNode() phase.</p>
<p><b>Warning:</b> As signals related to rendering might be emitted from the rendering thread, connections should be made using Qt::DirectConnection.</p>
<a name="resource-management"></a>
<h4 >Resource Management</h4>
<p>QML will try to cache images and scene graph nodes to improve performance, but in some low-memory scenarios it might be required to aggressively release these resources. The <a href="qquickwindow.html#releaseResources">releaseResources</a>() can be used to force the clean up of certain resources. Calling <a href="qquickwindow.html#releaseResources">releaseResources</a>() may result in the entire scene graph and its OpenGL context being deleted. The <a href="qquickwindow.html#sceneGraphInvalidated">sceneGraphInvalidated</a>() signal will be emitted when this happens.</p>
<p><b>Note: </b>All classes with QSG prefix should be used solely on the scene graph's rendering thread. See <a href="qtquick-visualcanvas-scenegraph.html#scene-graph-and-rendering">Scene Graph and Rendering</a> for more information.</p><a name="context-and-surface-formats"></a>
<h4 >Context and surface formats</h4>
<p>While it is possible to specify a QSurfaceFormat for every <a href="qquickwindow.html">QQuickWindow</a> by calling the member function setFormat(), windows may also be created from QML by using the Window and ApplicationWindow elements. In this case there is no C++ code involved in the creation of the window instance, yet applications may still wish to set certain surface format values, for example to request a given OpenGL version or profile. Such applications can call the static function QSurfaceFormat::setDefaultFormat() at startup. The specified format will be used for all Quick windows created afterwards.</p>
</div>
<p><b>See also </b><a href="qtquick-scenegraph-openglunderqml-example.html">Scene Graph - OpenGL Under QML</a>.</p>
<!-- @@@QQuickWindow -->
<div class="types">
<h2>Member Type Documentation</h2>
<!-- $$$CreateTextureOption$$$TextureHasAlphaChannel$$$TextureHasMipmaps$$$TextureOwnsGLTexture$$$TextureCanUseAtlas -->
<h3 class="flags" id="CreateTextureOption-enum"><a name="CreateTextureOption-enum"></a>enum QQuickWindow::<span class="name">CreateTextureOption</span><br/>flags QQuickWindow::<span class="name">CreateTextureOptions</span></h3>
<p>The CreateTextureOption enums are used to customize a texture is wrapped.</p>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>QQuickWindow::TextureHasAlphaChannel</code></td><td class="topAlign"><code>0x0001</code></td><td class="topAlign">The texture has an alpha channel and should be drawn using blending.</td></tr>
<tr><td class="topAlign"><code>QQuickWindow::TextureHasMipmaps</code></td><td class="topAlign"><code>0x0002</code></td><td class="topAlign">The texture has mipmaps and can be drawn with mipmapping enabled.</td></tr>
<tr><td class="topAlign"><code>QQuickWindow::TextureOwnsGLTexture</code></td><td class="topAlign"><code>0x0004</code></td><td class="topAlign">The texture object owns the texture id and will delete the GL texture when the texture object is deleted.</td></tr>
<tr><td class="topAlign"><code>QQuickWindow::TextureCanUseAtlas</code></td><td class="topAlign"><code>0x0008</code></td><td class="topAlign">The image can be uploaded into a texture atlas.</td></tr>
</table></div>
<p>The CreateTextureOptions type is a typedef for <a href="">QFlags</a><CreateTextureOption>. It stores an OR combination of CreateTextureOption values.</p>
<!-- @@@CreateTextureOption -->
<!-- $$$RenderStage$$$BeforeSynchronizingStage$$$AfterSynchronizingStage$$$BeforeRenderingStage$$$AfterRenderingStage$$$AfterSwapStage -->
<h3 class="fn" id="RenderStage-enum"><a name="RenderStage-enum"></a>enum QQuickWindow::<span class="name">RenderStage</span></h3>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>QQuickWindow::BeforeSynchronizingStage</code></td><td class="topAlign"><code>0</code></td><td class="topAlign">Before synchronization.</td></tr>
<tr><td class="topAlign"><code>QQuickWindow::AfterSynchronizingStage</code></td><td class="topAlign"><code>1</code></td><td class="topAlign">After synchronization.</td></tr>
<tr><td class="topAlign"><code>QQuickWindow::BeforeRenderingStage</code></td><td class="topAlign"><code>2</code></td><td class="topAlign">Before rendering.</td></tr>
<tr><td class="topAlign"><code>QQuickWindow::AfterRenderingStage</code></td><td class="topAlign"><code>3</code></td><td class="topAlign">After rendering.</td></tr>
<tr><td class="topAlign"><code>QQuickWindow::AfterSwapStage</code></td><td class="topAlign"><code>4</code></td><td class="topAlign">After the frame is swapped.</td></tr>
</table></div>
<p>This enum was introduced or modified in Qt 5.4.</p>
<p><b>See also </b><a href="qtquick-visualcanvas-scenegraph.html#scene-graph-and-rendering">Scene Graph and Rendering</a>.</p>
<!-- @@@RenderStage -->
<!-- $$$SceneGraphError$$$ContextNotAvailable -->
<h3 class="fn" id="SceneGraphError-enum"><a name="SceneGraphError-enum"></a>enum QQuickWindow::<span class="name">SceneGraphError</span></h3>
<p>This enum describes the error in a <a href="qquickwindow.html#sceneGraphError">sceneGraphError</a>() signal.</p>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>QQuickWindow::ContextNotAvailable</code></td><td class="topAlign"><code>1</code></td><td class="topAlign">OpenGL context creation failed. This typically means that no suitable OpenGL implementation was found, for example because no graphics drivers are installed and so no OpenGL 2 support is present. On mobile and embedded boards that use OpenGL ES such an error is likely to indicate issues in the windowing system integration and possibly an incorrect configuration of Qt.</td></tr>
</table></div>
<p>This enum was introduced or modified in Qt 5.3.</p>
<!-- @@@SceneGraphError -->
</div>
<div class="prop">
<h2>Property Documentation</h2>
<!-- $$$activeFocusItem-prop$$$activeFocusItem$$$activeFocusItemChanged -->
<h3 class="fn" id="activeFocusItem-prop"><a name="activeFocusItem-prop"></a><span class="name">activeFocusItem</span> : <span class="type"><a href="qquickitem.html">QQuickItem</a></span> * const</h3>
<p>This property holds the item which currently has active focus or if there is no item with active focus.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QQuickItem * </td><td class="memItemRight bottomAlign"><span class="name"><b>activeFocusItem</b></span>() const</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>activeFocusItemChanged</b></span>()</td></tr>
</table></div>
<!-- @@@activeFocusItem -->
<!-- $$$color-prop$$$color$$$setColorconstQColor&$$$colorChangedconstQColor& -->
<h3 class="fn" id="color-prop"><a name="color-prop"></a><span class="name">color</span> : <span class="type">QColor</span></h3>
<p>This property holds the color used to clear the OpenGL context.</p>
<p>Setting the clear color has no effect when clearing is disabled. By default, the clear color is white.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QColor </td><td class="memItemRight bottomAlign"><span class="name"><b>color</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setColor</b></span>(const QColor &<i> color</i>)</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>colorChanged</b></span>(const QColor &)</td></tr>
</table></div>
<p><b>See also </b><a href="qquickwindow.html#setClearBeforeRendering">setClearBeforeRendering</a>() and <a href="qquickwindow.html#setDefaultAlphaBuffer">setDefaultAlphaBuffer</a>().</p>
<!-- @@@color -->
<!-- $$$contentItem-prop$$$contentItem -->
<h3 class="fn" id="contentItem-prop"><a name="contentItem-prop"></a><span class="name">contentItem</span> : <span class="type"><a href="qquickitem.html">QQuickItem</a></span> * const</h3>
<p>This property holds the invisible root item of the scene.</p>
<p>A <a href="qquickwindow.html">QQuickWindow</a> always has a single invisible root item containing all of its content. To add items to this window, reparent the items to the contentItem or to an existing item in the scene.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QQuickItem * </td><td class="memItemRight bottomAlign"><span class="name"><b>contentItem</b></span>() const</td></tr>
</table></div>
<!-- @@@contentItem -->
</div>
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QQuickWindow[overload1]$$$QQuickWindowQWindow* -->
<h3 class="fn" id="QQuickWindow"><a name="QQuickWindow"></a>QQuickWindow::<span class="name">QQuickWindow</span>(<span class="type">QWindow</span> *<i> parent</i> = 0)</h3>
<p>Constructs a window for displaying a QML scene with parent window <i>parent</i>.</p>
<!-- @@@QQuickWindow -->
<!-- $$$~QQuickWindow[overload1]$$$~QQuickWindow -->
<h3 class="fn" id="dtor.QQuickWindow"><a name="dtor.QQuickWindow"></a><code>[virtual] </code>QQuickWindow::<span class="name">~QQuickWindow</span>()</h3>
<p>Destroys the window.</p>
<!-- @@@~QQuickWindow -->
<!-- $$$accessibleRoot[overload1]$$$accessibleRoot -->
<h3 class="fn" id="accessibleRoot"><a name="accessibleRoot"></a><span class="type">QAccessibleInterface</span> * QQuickWindow::<span class="name">accessibleRoot</span>() const</h3>
<p>Returns an accessibility interface for this window, or 0 if such an interface cannot be created.</p>
<!-- @@@accessibleRoot -->
<!-- $$$afterAnimating[overload1]$$$afterAnimating -->
<h3 class="fn" id="afterAnimating"><a name="afterAnimating"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">afterAnimating</span>()</h3>
<p>This signal is emitted on the gui thread before requesting the render thread to perform the synchronization of the scene graph.</p>
<p>Unlike the other similar signals, this one is emitted on the gui thread instead of the render thread. It can be used to synchronize external animation systems with the QML content.</p>
<p>This function was introduced in Qt 5.3.</p>
<!-- @@@afterAnimating -->
<!-- $$$afterRendering[overload1]$$$afterRendering -->
<h3 class="fn" id="afterRendering"><a name="afterRendering"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">afterRendering</span>()</h3>
<p>This signal is emitted after the scene has completed rendering, before swapbuffers is called.</p>
<p>This signal can be used to paint using raw GL on top of QML content, or to do screen scraping of the current frame buffer.</p>
<p>The GL context used for rendering the scene graph will be bound at this point.</p>
<p><b>Warning:</b> This signal is emitted from the scene graph rendering thread. If your slot function needs to finish before execution continues, you must make sure that the connection is direct (see Qt::ConnectionType).</p>
<p><b>Warning:</b> Make very sure that a signal handler for afterRendering() leaves the GL context in the same state as it was when the signal handler was entered. Failing to do so can result in the scene not rendering properly.</p>
<p><b>See also </b><a href="qquickwindow.html#resetOpenGLState">resetOpenGLState</a>().</p>
<!-- @@@afterRendering -->
<!-- $$$afterSynchronizing[overload1]$$$afterSynchronizing -->
<h3 class="fn" id="afterSynchronizing"><a name="afterSynchronizing"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">afterSynchronizing</span>()</h3>
<p>This signal is emitted after the scene graph is synchronized with the QML state.</p>
<p>This signal can be used to do preparation required after calls to <a href="qquickitem.html#updatePaintNode">QQuickItem::updatePaintNode</a>(), while the GUI thread is still locked.</p>
<p>The GL context used for rendering the scene graph will be bound at this point.</p>
<p><b>Warning:</b> This signal is emitted from the scene graph rendering thread. If your slot function needs to finish before execution continues, you must make sure that the connection is direct (see Qt::ConnectionType).</p>
<p><b>Warning:</b> Make very sure that a signal handler for afterSynchronizing leaves the GL context in the same state as it was when the signal handler was entered. Failing to do so can result in the scene not rendering properly.</p>
<p>This function was introduced in Qt 5.3.</p>
<p><b>See also </b><a href="qquickwindow.html#resetOpenGLState">resetOpenGLState</a>().</p>
<!-- @@@afterSynchronizing -->
<!-- $$$beforeRendering[overload1]$$$beforeRendering -->
<h3 class="fn" id="beforeRendering"><a name="beforeRendering"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">beforeRendering</span>()</h3>
<p>This signal is emitted before the scene starts rendering.</p>
<p>Combined with the modes for clearing the background, this option can be used to paint using raw GL under QML content.</p>
<p>The GL context used for rendering the scene graph will be bound at this point.</p>
<p><b>Warning:</b> This signal is emitted from the scene graph rendering thread. If your slot function needs to finish before execution continues, you must make sure that the connection is direct (see Qt::ConnectionType).</p>
<p><b>Warning:</b> Make very sure that a signal handler for beforeRendering leaves the GL context in the same state as it was when the signal handler was entered. Failing to do so can result in the scene not rendering properly.</p>
<p><b>See also </b><a href="qquickwindow.html#resetOpenGLState">resetOpenGLState</a>().</p>
<!-- @@@beforeRendering -->
<!-- $$$beforeSynchronizing[overload1]$$$beforeSynchronizing -->
<h3 class="fn" id="beforeSynchronizing"><a name="beforeSynchronizing"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">beforeSynchronizing</span>()</h3>
<p>This signal is emitted before the scene graph is synchronized with the QML state.</p>
<p>This signal can be used to do any preparation required before calls to <a href="qquickitem.html#updatePaintNode">QQuickItem::updatePaintNode</a>().</p>
<p>The GL context used for rendering the scene graph will be bound at this point.</p>
<p><b>Warning:</b> This signal is emitted from the scene graph rendering thread. If your slot function needs to finish before execution continues, you must make sure that the connection is direct (see Qt::ConnectionType).</p>
<p><b>Warning:</b> Make very sure that a signal handler for beforeSynchronizing leaves the GL context in the same state as it was when the signal handler was entered. Failing to do so can result in the scene not rendering properly.</p>
<p><b>See also </b><a href="qquickwindow.html#resetOpenGLState">resetOpenGLState</a>().</p>
<!-- @@@beforeSynchronizing -->
<!-- $$$clearBeforeRendering[overload1]$$$clearBeforeRendering -->
<h3 class="fn" id="clearBeforeRendering"><a name="clearBeforeRendering"></a><span class="type">bool</span> QQuickWindow::<span class="name">clearBeforeRendering</span>() const</h3>
<p>Returns whether clearing of the color buffer is done before rendering or not.</p>
<p><b>See also </b><a href="qquickwindow.html#setClearBeforeRendering">setClearBeforeRendering</a>().</p>
<!-- @@@clearBeforeRendering -->
<!-- $$$closing[overload1]$$$closingQQuickCloseEvent* -->
<h3 class="fn" id="closing"><a name="closing"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">closing</span>(<span class="type">QQuickCloseEvent</span> *<i> close</i>)</h3>
<p>This signal is emitted when the window receives the event <i>close</i> from the windowing system.</p>
<p>This function was introduced in Qt 5.1.</p>
<!-- @@@closing -->
<!-- $$$createTextureFromId[overload1]$$$createTextureFromIduintconstQSize&CreateTextureOptions -->
<h3 class="fn" id="createTextureFromId"><a name="createTextureFromId"></a><span class="type"><a href="qsgtexture.html">QSGTexture</a></span> * QQuickWindow::<span class="name">createTextureFromId</span>(<span class="type">uint</span><i> id</i>, const <span class="type">QSize</span> &<i> size</i>, <span class="type"><a href="qquickwindow.html#CreateTextureOption-enum">CreateTextureOptions</a></span><i> options</i> = CreateTextureOption( 0 )) const</h3>
<p>Creates a new <a href="qsgtexture.html">QSGTexture</a> object from an existing GL texture <i>id</i> and <i>size</i>.</p>
<p>The caller of the function is responsible for deleting the returned texture.</p>
<p>The returned texture will be using <code>GL_TEXTURE_2D</code> as texture target and assumes that internal format is <code>GL_RGBA</code>. Reimplement <a href="qsgtexture.html">QSGTexture</a> to create textures with different parameters.</p>
<p>Use <i>options</i> to customize the texture attributes. The TextureUsesAtlas option is ignored.</p>
<p><b>Warning:</b> This function will return 0 if the scenegraph has not yet been initialized.</p>
<p><b>See also </b><a href="qquickwindow.html#sceneGraphInitialized">sceneGraphInitialized</a>() and <a href="qsgtexture.html">QSGTexture</a>.</p>
<!-- @@@createTextureFromId -->
<!-- $$$createTextureFromImage[overload1]$$$createTextureFromImageconstQImage&CreateTextureOptions -->
<h3 class="fn" id="createTextureFromImage"><a name="createTextureFromImage"></a><span class="type"><a href="qsgtexture.html">QSGTexture</a></span> * QQuickWindow::<span class="name">createTextureFromImage</span>(const <span class="type">QImage</span> &<i> image</i>, <span class="type"><a href="qquickwindow.html#CreateTextureOption-enum">CreateTextureOptions</a></span><i> options</i>) const</h3>
<p>Creates a new <a href="qsgtexture.html">QSGTexture</a> from the supplied <i>image</i>. If the image has an alpha channel, the corresponding texture will have an alpha channel.</p>
<p>The caller of the function is responsible for deleting the returned texture. The actual GL texture will be deleted when the texture object is deleted.</p>
<p>When <i>options</i> contains <a href="qquickwindow.html#CreateTextureOption-enum">TextureCanUseAtlas</a> the engine may put the image into a texture atlas. Textures in an atlas need to rely on <a href="qsgtexture.html#normalizedTextureSubRect">QSGTexture::normalizedTextureSubRect</a>() for their geometry and will not support <a href="qsgtexture.html#WrapMode-enum">QSGTexture::Repeat</a>. Other values from <a href="qquickwindow.html#CreateTextureOption-enum">CreateTextureOption</a> are ignored.</p>
<p>The returned texture will be using <code>GL_TEXTURE_2D</code> as texture target and <code>GL_RGBA</code> as internal format. Reimplement <a href="qsgtexture.html">QSGTexture</a> to create textures with different parameters.</p>
<p><b>Warning:</b> This function will return 0 if the scene graph has not yet been initialized.</p>
<p><b>Warning:</b> The returned texture is not memory managed by the scene graph and must be explicitly deleted by the caller on the rendering thread. This is achieved by deleting the texture from a <a href="qsgnode.html">QSGNode</a> destructor or by using deleteLater() in the case where the texture already has affinity to the rendering thread.</p>
<p>This function can be called from any thread.</p>
<p><b>See also </b><a href="qquickwindow.html#sceneGraphInitialized">sceneGraphInitialized</a>() and <a href="qsgtexture.html">QSGTexture</a>.</p>
<!-- @@@createTextureFromImage -->
<!-- $$$createTextureFromImage$$$createTextureFromImageconstQImage& -->
<h3 class="fn" id="createTextureFromImage-2"><a name="createTextureFromImage-2"></a><span class="type"><a href="qsgtexture.html">QSGTexture</a></span> * QQuickWindow::<span class="name">createTextureFromImage</span>(const <span class="type">QImage</span> &<i> image</i>) const</h3>
<p>This is an overloaded function.</p>
<!-- @@@createTextureFromImage -->
<!-- $$$effectiveDevicePixelRatio[overload1]$$$effectiveDevicePixelRatio -->
<h3 class="fn" id="effectiveDevicePixelRatio"><a name="effectiveDevicePixelRatio"></a><span class="type">qreal</span> QQuickWindow::<span class="name">effectiveDevicePixelRatio</span>() const</h3>
<p>Returns the device pixel ratio for this window.</p>
<p>This is different from QWindow::devicePixelRatio() in that it supports redirected rendering via <a href="qquickrendercontrol.html">QQuickRenderControl</a>. When using a <a href="qquickrendercontrol.html">QQuickRenderControl</a>, the <a href="qquickwindow.html">QQuickWindow</a> is often not created, meaning it is never shown and there is no underlying native window created in the windowing system. As a result, querying properties like the device pixel ratio cannot give correct results. Use this function instead.</p>
<p><b>See also </b>QWindow::devicePixelRatio().</p>
<!-- @@@effectiveDevicePixelRatio -->
<!-- $$$event[overload1]$$$eventQEvent* -->
<h3 class="fn" id="event"><a name="event"></a><code>[protected] </code><span class="type">bool</span> QQuickWindow::<span class="name">event</span>(<span class="type">QEvent</span> *<i> e</i>)</h3>
<!-- @@@event -->
<!-- $$$exposeEvent[overload1]$$$exposeEventQExposeEvent* -->
<h3 class="fn" id="exposeEvent"><a name="exposeEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">exposeEvent</span>(<span class="type">QExposeEvent</span> *)</h3>
<!-- @@@exposeEvent -->
<!-- $$$focusInEvent[overload1]$$$focusInEventQFocusEvent* -->
<h3 class="fn" id="focusInEvent"><a name="focusInEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">focusInEvent</span>(<span class="type">QFocusEvent</span> *<i> ev</i>)</h3>
<!-- @@@focusInEvent -->
<!-- $$$focusOutEvent[overload1]$$$focusOutEventQFocusEvent* -->
<h3 class="fn" id="focusOutEvent"><a name="focusOutEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">focusOutEvent</span>(<span class="type">QFocusEvent</span> *<i> ev</i>)</h3>
<!-- @@@focusOutEvent -->
<!-- $$$frameSwapped[overload1]$$$frameSwapped -->
<h3 class="fn" id="frameSwapped"><a name="frameSwapped"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">frameSwapped</span>()</h3>
<p>This signal is emitted when the frame buffers have been swapped.</p>
<p>This signal will be emitted from the scene graph rendering thread.</p>
<!-- @@@frameSwapped -->
<!-- $$$grabWindow[overload1]$$$grabWindow -->
<h3 class="fn" id="grabWindow"><a name="grabWindow"></a><span class="type">QImage</span> QQuickWindow::<span class="name">grabWindow</span>()</h3>
<p>Grabs the contents of the window and returns it as an image.</p>
<p>It is possible to call the grabWindow() function when the window is not visible. This requires that the window is created and has a valid size and that no other <a href="qquickwindow.html">QQuickWindow</a> instances are rendering in the same process.</p>
<p><b>Warning:</b> Calling this function will cause performance problems.</p>
<p><b>Warning:</b> This function can only be called from the GUI thread.</p>
<!-- @@@grabWindow -->
<!-- $$$hasDefaultAlphaBuffer[overload1]$$$hasDefaultAlphaBuffer -->
<h3 class="fn" id="hasDefaultAlphaBuffer"><a name="hasDefaultAlphaBuffer"></a><code>[static] </code><span class="type">bool</span> QQuickWindow::<span class="name">hasDefaultAlphaBuffer</span>()</h3>
<p>Returns whether to use alpha transparency on newly created windows.</p>
<p>This function was introduced in Qt 5.1.</p>
<p><b>See also </b><a href="qquickwindow.html#setDefaultAlphaBuffer">setDefaultAlphaBuffer</a>().</p>
<!-- @@@hasDefaultAlphaBuffer -->
<!-- $$$hideEvent[overload1]$$$hideEventQHideEvent* -->
<h3 class="fn" id="hideEvent"><a name="hideEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">hideEvent</span>(<span class="type">QHideEvent</span> *)</h3>
<!-- @@@hideEvent -->
<!-- $$$incubationController[overload1]$$$incubationController -->
<h3 class="fn" id="incubationController"><a name="incubationController"></a><span class="type">QQmlIncubationController</span> * QQuickWindow::<span class="name">incubationController</span>() const</h3>
<p>Returns an incubation controller that splices incubation between frames for this window. <a href="qquickview.html">QQuickView</a> automatically installs this controller for you, otherwise you will need to install it yourself using QQmlEngine::setIncubationController().</p>
<p>The controller is owned by the window and will be destroyed when the window is deleted.</p>
<!-- @@@incubationController -->
<!-- $$$isPersistentOpenGLContext[overload1]$$$isPersistentOpenGLContext -->
<h3 class="fn" id="isPersistentOpenGLContext"><a name="isPersistentOpenGLContext"></a><span class="type">bool</span> QQuickWindow::<span class="name">isPersistentOpenGLContext</span>() const</h3>
<p>Returns whether the OpenGL context can be released during the lifetime of the <a href="qquickwindow.html">QQuickWindow</a>.</p>
<p><b>Note: </b>This is a hint. When and how this happens is implementation specific.</p><!-- @@@isPersistentOpenGLContext -->
<!-- $$$isPersistentSceneGraph[overload1]$$$isPersistentSceneGraph -->
<h3 class="fn" id="isPersistentSceneGraph"><a name="isPersistentSceneGraph"></a><span class="type">bool</span> QQuickWindow::<span class="name">isPersistentSceneGraph</span>() const</h3>
<p>Returns whether the scene graph nodes and resources can be released during the lifetime of this <a href="qquickwindow.html">QQuickWindow</a>.</p>
<p><b>Note: </b>This is a hint. When and how this happens is implementation specific.</p><!-- @@@isPersistentSceneGraph -->
<!-- $$$isSceneGraphInitialized[overload1]$$$isSceneGraphInitialized -->
<h3 class="fn" id="isSceneGraphInitialized"><a name="isSceneGraphInitialized"></a><span class="type">bool</span> QQuickWindow::<span class="name">isSceneGraphInitialized</span>() const</h3>
<p>Returns true if the scene graph has been initialized; otherwise returns false.</p>
<!-- @@@isSceneGraphInitialized -->
<!-- $$$keyPressEvent[overload1]$$$keyPressEventQKeyEvent* -->
<h3 class="fn" id="keyPressEvent"><a name="keyPressEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">keyPressEvent</span>(<span class="type">QKeyEvent</span> *<i> e</i>)</h3>
<!-- @@@keyPressEvent -->
<!-- $$$keyReleaseEvent[overload1]$$$keyReleaseEventQKeyEvent* -->
<h3 class="fn" id="keyReleaseEvent"><a name="keyReleaseEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">keyReleaseEvent</span>(<span class="type">QKeyEvent</span> *<i> e</i>)</h3>
<!-- @@@keyReleaseEvent -->
<!-- $$$mouseDoubleClickEvent[overload1]$$$mouseDoubleClickEventQMouseEvent* -->
<h3 class="fn" id="mouseDoubleClickEvent"><a name="mouseDoubleClickEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">mouseDoubleClickEvent</span>(<span class="type">QMouseEvent</span> *<i> event</i>)</h3>
<!-- @@@mouseDoubleClickEvent -->
<!-- $$$mouseGrabberItem[overload1]$$$mouseGrabberItem -->
<h3 class="fn" id="mouseGrabberItem"><a name="mouseGrabberItem"></a><span class="type"><a href="qquickitem.html">QQuickItem</a></span> * QQuickWindow::<span class="name">mouseGrabberItem</span>() const</h3>
<p>Returns the item which currently has the mouse grab.</p>
<!-- @@@mouseGrabberItem -->
<!-- $$$mouseMoveEvent[overload1]$$$mouseMoveEventQMouseEvent* -->
<h3 class="fn" id="mouseMoveEvent"><a name="mouseMoveEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">mouseMoveEvent</span>(<span class="type">QMouseEvent</span> *<i> event</i>)</h3>
<!-- @@@mouseMoveEvent -->
<!-- $$$mousePressEvent[overload1]$$$mousePressEventQMouseEvent* -->
<h3 class="fn" id="mousePressEvent"><a name="mousePressEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">mousePressEvent</span>(<span class="type">QMouseEvent</span> *<i> event</i>)</h3>
<!-- @@@mousePressEvent -->
<!-- $$$mouseReleaseEvent[overload1]$$$mouseReleaseEventQMouseEvent* -->
<h3 class="fn" id="mouseReleaseEvent"><a name="mouseReleaseEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">mouseReleaseEvent</span>(<span class="type">QMouseEvent</span> *<i> event</i>)</h3>
<!-- @@@mouseReleaseEvent -->
<!-- $$$openglContext[overload1]$$$openglContext -->
<h3 class="fn" id="openglContext"><a name="openglContext"></a><span class="type">QOpenGLContext</span> * QQuickWindow::<span class="name">openglContext</span>() const</h3>
<p>Returns the opengl context used for rendering.</p>
<p>If the scene graph is not ready, this function will return 0.</p>
<p><b>See also </b><a href="qquickwindow.html#sceneGraphInitialized">sceneGraphInitialized</a>() and <a href="qquickwindow.html#sceneGraphInvalidated">sceneGraphInvalidated</a>().</p>
<!-- @@@openglContext -->
<!-- $$$openglContextCreated[overload1]$$$openglContextCreatedQOpenGLContext* -->
<h3 class="fn" id="openglContextCreated"><a name="openglContextCreated"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">openglContextCreated</span>(<span class="type">QOpenGLContext</span> *<i> context</i>)</h3>
<p>This signal is emitted on the gui thread when the OpenGL <i>context</i> for this window is created, before it is made current.</p>
<p>Some implementations will share the same OpenGL context between multiple <a href="qquickwindow.html">QQuickWindow</a> instances. The openglContextCreated() signal will in this case only be emitted for the first window, when the OpenGL context is actually created.</p>
<p><a href="qquickwindow.html#openglContext">QQuickWindow::openglContext</a>() will still return 0 for this window until after the QQuickWindow::sceneGraphInitialize() has been emitted.</p>
<p>This function was introduced in Qt 5.3.</p>
<!-- @@@openglContextCreated -->
<!-- $$$releaseResources[overload1]$$$releaseResources -->
<h3 class="fn" id="releaseResources"><a name="releaseResources"></a><code>[slot] </code><span class="type">void</span> QQuickWindow::<span class="name">releaseResources</span>()</h3>
<p>This function tries to release redundant resources currently held by the QML scene.</p>
<p>Calling this function might result in the scene graph and the OpenGL context used for rendering being released to release graphics memory. If this happens, the <a href="qquickwindow.html#sceneGraphInvalidated">sceneGraphInvalidated</a>() signal will be called, allowing users to clean up their own graphics resources. The <a href="qquickwindow.html#setPersistentOpenGLContext">setPersistentOpenGLContext</a>() and <a href="qquickwindow.html#setPersistentSceneGraph">setPersistentSceneGraph</a>() functions can be used to prevent this from happening, if handling the cleanup is not feasible in the application, at the cost of higher memory usage.</p>
<p><b>See also </b><a href="qquickwindow.html#sceneGraphInvalidated">sceneGraphInvalidated</a>(), <a href="qquickwindow.html#setPersistentOpenGLContext">setPersistentOpenGLContext</a>(), and <a href="qquickwindow.html#setPersistentSceneGraph">setPersistentSceneGraph</a>().</p>
<!-- @@@releaseResources -->
<!-- $$$renderTarget[overload1]$$$renderTarget -->
<h3 class="fn" id="renderTarget"><a name="renderTarget"></a><span class="type">QOpenGLFramebufferObject</span> * QQuickWindow::<span class="name">renderTarget</span>() const</h3>
<p>Returns the render target for this window.</p>
<p>The default is to render to the surface of the window, in which case the render target is 0.</p>
<p><b>See also </b><a href="qquickwindow.html#setRenderTarget">setRenderTarget</a>().</p>
<!-- @@@renderTarget -->
<!-- $$$renderTargetId[overload1]$$$renderTargetId -->
<h3 class="fn" id="renderTargetId"><a name="renderTargetId"></a><span class="type">uint</span> QQuickWindow::<span class="name">renderTargetId</span>() const</h3>
<p>Returns the FBO id of the render target when set; otherwise returns 0.</p>
<!-- @@@renderTargetId -->
<!-- $$$renderTargetSize[overload1]$$$renderTargetSize -->
<h3 class="fn" id="renderTargetSize"><a name="renderTargetSize"></a><span class="type">QSize</span> QQuickWindow::<span class="name">renderTargetSize</span>() const</h3>
<p>Returns the size of the currently set render target; otherwise returns an empty size.</p>
<!-- @@@renderTargetSize -->
<!-- $$$resetOpenGLState[overload1]$$$resetOpenGLState -->
<h3 class="fn" id="resetOpenGLState"><a name="resetOpenGLState"></a><span class="type">void</span> QQuickWindow::<span class="name">resetOpenGLState</span>()</h3>
<p>Call this function to reset the OpenGL context its default state.</p>
<p>The scene graph uses the OpenGL context and will both rely on and clobber its state. When mixing raw OpenGL commands with scene graph rendering, this function provides a convenient way of resetting the OpenGL context state back to its default values.</p>
<p>This function does not touch state in the fixed-function pipeline.</p>
<p>This function does not clear the color, depth and stencil buffers. Use <a href="qquickwindow.html#setClearBeforeRendering">QQuickWindow::setClearBeforeRendering</a> to control clearing of the color buffer. The depth and stencil buffer might be clobbered by the scene graph renderer. Clear these manually on demand.</p>
<p>This function was introduced in Qt 5.2.</p>
<p><b>See also </b><a href="qquickwindow.html#beforeRendering">QQuickWindow::beforeRendering</a>().</p>
<!-- @@@resetOpenGLState -->
<!-- $$$resizeEvent[overload1]$$$resizeEventQResizeEvent* -->
<h3 class="fn" id="resizeEvent"><a name="resizeEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">resizeEvent</span>(<span class="type">QResizeEvent</span> *<i> ev</i>)</h3>
<!-- @@@resizeEvent -->
<!-- $$$sceneGraphAboutToStop[overload1]$$$sceneGraphAboutToStop -->
<h3 class="fn" id="sceneGraphAboutToStop"><a name="sceneGraphAboutToStop"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">sceneGraphAboutToStop</span>()</h3>
<p>This signal is emitted on the render thread when the scene graph is about to stop rendering. This happens usually because the window has been hidden.</p>
<p>Applications may use this signal to release resources, but should be prepared to reinstantiated them again fast. The scene graph and the OpenGL context are not released at this time.</p>
<p><b>Warning:</b> This signal is emitted from the scene graph rendering thread. If your slot function needs to finish before execution continues, you must make sure that the connection is direct (see Qt::ConnectionType).</p>
<p><b>Warning:</b> Make very sure that a signal handler for sceneGraphAboutToStop() leaves the GL context in the same state as it was when the signal handler was entered. Failing to do so can result in the scene not rendering properly.</p>
<p>This function was introduced in Qt 5.3.</p>
<p><b>See also </b><a href="qquickwindow.html#sceneGraphInvalidated">sceneGraphInvalidated</a>() and <a href="qquickwindow.html#resetOpenGLState">resetOpenGLState</a>().</p>
<!-- @@@sceneGraphAboutToStop -->
<!-- $$$sceneGraphError[overload1]$$$sceneGraphErrorQQuickWindow::SceneGraphErrorconstQString& -->
<h3 class="fn" id="sceneGraphError"><a name="sceneGraphError"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">sceneGraphError</span>(<span class="type"><a href="qquickwindow.html#SceneGraphError-enum">QQuickWindow::SceneGraphError</a></span><i> error</i>, const <span class="type">QString</span> &<i> message</i>)</h3>
<p>This signal is emitted when an <i>error</i> occurred during scene graph initialization.</p>
<p>Applications should connect to this signal if they wish to handle errors, like OpenGL context creation failures, in a custom way. When no slot is connected to the signal, the behavior will be different: Quick will print the <i>message</i>, or show a message box, and terminate the application.</p>
<p>This signal will be emitted from the gui thread.</p>
<p>This function was introduced in Qt 5.3.</p>
<!-- @@@sceneGraphError -->
<!-- $$$sceneGraphInitialized[overload1]$$$sceneGraphInitialized -->
<h3 class="fn" id="sceneGraphInitialized"><a name="sceneGraphInitialized"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">sceneGraphInitialized</span>()</h3>
<p>This signal is emitted when the scene graph has been initialized.</p>
<p>This signal will be emitted from the scene graph rendering thread.</p>
<!-- @@@sceneGraphInitialized -->
<!-- $$$sceneGraphInvalidated[overload1]$$$sceneGraphInvalidated -->
<h3 class="fn" id="sceneGraphInvalidated"><a name="sceneGraphInvalidated"></a><code>[signal] </code><span class="type">void</span> QQuickWindow::<span class="name">sceneGraphInvalidated</span>()</h3>
<p>This signal is emitted when the scene graph has been invalidated.</p>
<p>This signal implies that the opengl rendering context used has been invalidated and all user resources tied to that context should be released.</p>
<p>The OpenGL context of this window will be bound when this function is called. The only exception is if the native OpenGL has been destroyed outside Qt's control, for instance through EGL_CONTEXT_LOST.</p>
<p>This signal will be emitted from the scene graph rendering thread.</p>
<!-- @@@sceneGraphInvalidated -->
<!-- $$$scheduleRenderJob[overload1]$$$scheduleRenderJobQRunnable*RenderStage -->
<h3 class="fn" id="scheduleRenderJob"><a name="scheduleRenderJob"></a><span class="type">void</span> QQuickWindow::<span class="name">scheduleRenderJob</span>(<span class="type">QRunnable</span> *<i> job</i>, <span class="type"><a href="qquickwindow.html#RenderStage-enum">RenderStage</a></span><i> stage</i>)</h3>
<p>Schedules <i>job</i> to run when the rendering of this window reaches the given <i>stage</i>.</p>
<p>This is a convenience to the equivalent signals in <a href="qquickwindow.html">QQuickWindow</a> for "one shot" tasks.</p>
<p>The window takes ownership over <i>job</i> and will delete it when the job is completed.</p>
<p>If rendering is shut down before <i>job</i> has a chance to run, the job will be run and then deleted as part of the scene graph cleanup. If the window is never shown and no rendering happens before the <a href="qquickwindow.html">QQuickWindow</a> is destroyed, all pending jobs will be destroyed without their run() method being called.</p>
<p>If the rendering is happening on a different thread, then the job will happen on the rendering thread.</p>
<p><b>Note: </b>This function does not trigger rendering; the job will be stored run until rendering is triggered elsewhere. To force the job to run earlier, call <a href="qquickwindow.html#update">QQuickWindow::update</a>();</p><p>This function was introduced in Qt 5.4.</p>
<p><b>See also </b><a href="qquickwindow.html#beforeRendering">beforeRendering</a>(), <a href="qquickwindow.html#afterRendering">afterRendering</a>(), <a href="qquickwindow.html#beforeSynchronizing">beforeSynchronizing</a>(), <a href="qquickwindow.html#afterSynchronizing">afterSynchronizing</a>(), <a href="qquickwindow.html#frameSwapped">frameSwapped</a>(), and <a href="qquickwindow.html#sceneGraphInvalidated">sceneGraphInvalidated</a>().</p>
<!-- @@@scheduleRenderJob -->
<!-- $$$sendEvent[overload1]$$$sendEventQQuickItem*QEvent* -->
<h3 class="fn" id="sendEvent"><a name="sendEvent"></a><span class="type">bool</span> QQuickWindow::<span class="name">sendEvent</span>(<span class="type"><a href="qquickitem.html">QQuickItem</a></span> *<i> item</i>, <span class="type">QEvent</span> *<i> e</i>)</h3>
<p>Propagates an event <i>e</i> to a <a href="qquickitem.html">QQuickItem</a> <i>item</i> on the window.</p>
<p>The return value is currently not used.</p>
<!-- @@@sendEvent -->
<!-- $$$setClearBeforeRendering[overload1]$$$setClearBeforeRenderingbool -->
<h3 class="fn" id="setClearBeforeRendering"><a name="setClearBeforeRendering"></a><span class="type">void</span> QQuickWindow::<span class="name">setClearBeforeRendering</span>(<span class="type">bool</span><i> enabled</i>)</h3>
<p>Sets whether the scene graph rendering of QML should clear the color buffer before it starts rendering to <i>enabled</i>.</p>
<p>By disabling clearing of the color buffer, it is possible to do GL painting under the scene graph.</p>
<p>The color buffer is cleared by default.</p>
<p><b>See also </b><a href="qquickwindow.html#clearBeforeRendering">clearBeforeRendering</a>() and <a href="qquickwindow.html#beforeRendering">beforeRendering</a>().</p>
<!-- @@@setClearBeforeRendering -->
<!-- $$$setDefaultAlphaBuffer[overload1]$$$setDefaultAlphaBufferbool -->
<h3 class="fn" id="setDefaultAlphaBuffer"><a name="setDefaultAlphaBuffer"></a><code>[static] </code><span class="type">void</span> QQuickWindow::<span class="name">setDefaultAlphaBuffer</span>(<span class="type">bool</span><i> useAlpha</i>)</h3>
<p><i>useAlpha</i> specifies whether to use alpha transparency on newly created windows.</p>
<p>In any application which expects to create translucent windows, it's necessary to set this to true before creating the first <a href="qquickwindow.html">QQuickWindow</a>. The default value is false.</p>
<p>This function was introduced in Qt 5.1.</p>
<p><b>See also </b><a href="qquickwindow.html#hasDefaultAlphaBuffer">hasDefaultAlphaBuffer</a>().</p>
<!-- @@@setDefaultAlphaBuffer -->
<!-- $$$setPersistentOpenGLContext[overload1]$$$setPersistentOpenGLContextbool -->
<h3 class="fn" id="setPersistentOpenGLContext"><a name="setPersistentOpenGLContext"></a><span class="type">void</span> QQuickWindow::<span class="name">setPersistentOpenGLContext</span>(<span class="type">bool</span><i> persistent</i>)</h3>
<p>Sets whether the OpenGL context should be preserved, and cannot be released until the last window is deleted, to <i>persistent</i>. The default value is true.</p>
<p>The OpenGL context can be released to free up graphics resources when the window is obscured, hidden or not rendering. When this happens is implementation specific.</p>
<p>The QOpenGLContext::aboutToBeDestroyed() signal is emitted from the <a href="qquickwindow.html#openglContext">QQuickWindow::openglContext</a>() when the OpenGL context is about to be released. The <a href="qquickwindow.html#sceneGraphInitialized">QQuickWindow::sceneGraphInitialized</a>() signal is emitted when a new OpenGL context is created for this window. Make a Qt::DirectConnection to these signals to be notified.</p>
<p>The OpenGL context is still released when the last <a href="qquickwindow.html">QQuickWindow</a> is deleted.</p>
<p><b>See also </b><a href="qquickwindow.html#isPersistentOpenGLContext">isPersistentOpenGLContext</a>(), <a href="qquickwindow.html#setPersistentSceneGraph">setPersistentSceneGraph</a>(), QOpenGLContext::aboutToBeDestroyed(), and <a href="qquickwindow.html#sceneGraphInitialized">sceneGraphInitialized</a>().</p>
<!-- @@@setPersistentOpenGLContext -->
<!-- $$$setPersistentSceneGraph[overload1]$$$setPersistentSceneGraphbool -->
<h3 class="fn" id="setPersistentSceneGraph"><a name="setPersistentSceneGraph"></a><span class="type">void</span> QQuickWindow::<span class="name">setPersistentSceneGraph</span>(<span class="type">bool</span><i> persistent</i>)</h3>
<p>Sets whether the scene graph nodes and resources can be released to <i>persistent</i>. The default value is true.</p>
<p>The scene graph nodes and resources can be released to free up graphics resources when the window is obscured, hidden or not rendering. When this happens is implementation specific.</p>
<p>The <a href="qquickwindow.html#sceneGraphInvalidated">QQuickWindow::sceneGraphInvalidated</a>() signal is emitted when cleanup occurs. The <a href="qquickwindow.html#sceneGraphInitialized">QQuickWindow::sceneGraphInitialized</a>() signal is emitted when a new scene graph is recreated for this window. Make a Qt::DirectConnection to these signals to be notified.</p>
<p>The scene graph nodes and resources are still released when the last <a href="qquickwindow.html">QQuickWindow</a> is deleted.</p>
<p><b>See also </b><a href="qquickwindow.html#isPersistentSceneGraph">isPersistentSceneGraph</a>(), <a href="qquickwindow.html#setPersistentOpenGLContext">setPersistentOpenGLContext</a>(), <a href="qquickwindow.html#sceneGraphInvalidated">sceneGraphInvalidated</a>(), and <a href="qquickwindow.html#sceneGraphInitialized">sceneGraphInitialized</a>().</p>
<!-- @@@setPersistentSceneGraph -->
<!-- $$$setRenderTarget[overload1]$$$setRenderTargetQOpenGLFramebufferObject* -->
<h3 class="fn" id="setRenderTarget"><a name="setRenderTarget"></a><span class="type">void</span> QQuickWindow::<span class="name">setRenderTarget</span>(<span class="type">QOpenGLFramebufferObject</span> *<i> fbo</i>)</h3>
<p>Sets the render target for this window to be <i>fbo</i>.</p>
<p>The specified fbo must be created in the context of the window or one that shares with it.</p>
<p><b>Warning:</b> This function can only be called from the thread doing the rendering.</p>
<p><b>See also </b><a href="qquickwindow.html#renderTarget">renderTarget</a>().</p>
<!-- @@@setRenderTarget -->
<!-- $$$setRenderTarget$$$setRenderTargetuintconstQSize& -->
<h3 class="fn" id="setRenderTarget-2"><a name="setRenderTarget-2"></a><span class="type">void</span> QQuickWindow::<span class="name">setRenderTarget</span>(<span class="type">uint</span><i> fboId</i>, const <span class="type">QSize</span> &<i> size</i>)</h3>
<p>This is an overloaded function.</p>
<p>Sets the render target for this window to be an FBO with <i>fboId</i> and <i>size</i>.</p>
<p>The specified FBO must be created in the context of the window or one that shares with it.</p>
<p><b>Warning:</b> This function can only be called from the thread doing the rendering.</p>
<!-- @@@setRenderTarget -->
<!-- $$$showEvent[overload1]$$$showEventQShowEvent* -->
<h3 class="fn" id="showEvent"><a name="showEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">showEvent</span>(<span class="type">QShowEvent</span> *)</h3>
<!-- @@@showEvent -->
<!-- $$$update[overload1]$$$update -->
<h3 class="fn" id="update"><a name="update"></a><code>[slot] </code><span class="type">void</span> QQuickWindow::<span class="name">update</span>()</h3>
<p>Schedules the window to render another frame.</p>
<p>Calling QQuickWindow::update() differs from <a href="qquickitem.html#update">QQuickItem::update</a>() in that it always triggers a repaint, regardless of changes in the underlying scene graph or not.</p>
<!-- @@@update -->
<!-- $$$wheelEvent[overload1]$$$wheelEventQWheelEvent* -->
<h3 class="fn" id="wheelEvent"><a name="wheelEvent"></a><code>[protected] </code><span class="type">void</span> QQuickWindow::<span class="name">wheelEvent</span>(<span class="type">QWheelEvent</span> *<i> event</i>)</h3>
<!-- @@@wheelEvent -->
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<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
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